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Carbon nanotubes (CNTs) offer unique properties such as the highest current density, ballistic transport, ultrahigh thermal conductivity, and extremely high mechanical strength. Because of these remarkable properties, they have been expected for use as wiring materials and as alternate channel materials for extending complementary metal-oxide-semiconductor (CMOS) performance in future very large scale...
In this study, we are focusing on the detailed control of the size and density of nanoparticles on the substrate by employing the gas-phase catalyst. To fabricate iron (Fe) nanoparticles as catalyst, Fe(CO)5 gas was used. Size and density of the nanoparticles can be controlled by varying the experimental parameters, such as the molar flow rate, the decomposition temperature and the flow time. Quartz...
Carbon nanotubes (CNTs) films were synthesized at low pressure using nickel as catalyst by thermal chemical vapor deposition with hydrogen-acetylene mixture. The Raman characteristics and morphological features of CNTs at different substrate temperatures were investigated. The variation of CNTs morphological feature mainly depends on the substrate temperatures. In the low temperature range (450-550degC),...
Well aligned Si nanowires (SiNWs) by Vapor-Liquid-Solid growth process are presented. Instead of using H2, the current work uses N2 as carrier gas. The growth conditions of SiNWs are controlled by the ratio of nitrogen versus silane gas. Tapering of nanowires was found at T=620degC and P=333 m torr, and the tapering parameter was reduced by increasing the N2 gas. Tapering of nanowires is attributed...
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